Molding means for concrete staves



Dec. 25, 1934. s. G. MARTIN 1,985,575

MOLDING MEANS FOR CONCRETE STAVES Filed April e, 1932 2 sheets-sheet 1 Dec. 25, 1934.` s. G. MARTIN 1,985,575

MODDING MEANSv FOR CONCRETE STAVES Filed April 6, 1932 2 Sheets-Sheet 2 n l. ur-n Patented Dec. 25, 1934 f l,985,57

`- t v 1,985,5155. 5 MoLnINMmNs."coNcRETEfsTAvEs i Sidney:calunnie;-tehleegceiii.v Annlicatiomaprn e-.,1932; serial No. 603,630;4

a-eolafmsl (onzer-1er) 'Iheiinvention.relates.ltoiimprovementsiimcon stem-portion 14 are positioned'with thefangeeinra crete. construction? ande more-'J particularlyl tot: ai bearing.,- engagement:l with .z the earth,- while the y: novel: .form of apparatunforr: molding:` staveseof stem -portions are directedvinwardlygfor engage:-l precastY concrete'. designed 1 to hir-vee intert ment-ibi?, vvthe:bracing;-metal` rings 16.*; By' meandri:

5,. engagement wherra;numbel:ioffithe.unitsfareiassoe of longitudinal projections 18;andrecessea0:-'pro.. :L ciatedlinzthefpropertmanner .te comprisesas,..fo1izA vided on the edges of the ange portionfthe example;- afcylimlricabconicalgoruiat member. U staves are-Vinterlocked with' yadjacent 'units.,g f

The-lagging-orstavesifornmdhythemoldiorrthef Afterv the'- excavation-has been lined-.With ar; inventionrvvhen viewedriirtcrossfsectioiriconsit'.oni cylindricaleor other. shaped-member: formed-1011.1 1m a ilange having on one face a rearmdlywpnoe' precasty concrete staves` asV above described theel()- jectinggstem p ortinmio-a greater Width at its Wellis-then-dug to'a'10Wer-deilth ahdzthezsame: outer end than at the junction with the flange, process is repeated until rock or suitable foundathe particular shape of the stem serving to intertion is encountered. To complete the pier the lock with the later filled in concrete so as to addiwell is lled with plastic concrete and by reason tionally strengthen the completed pier. In the of the particular Cross sectional shape of the cylindrical members formed by the lagging the stem portions 14 on the present type of staves stem portions are directed inwardly and by rethe latter and the plastic concrete are securely ducing the interior diameter result in a saving in united, the staves in fact interlocking with the the metal used in the rings employed for bracing concrete to add to the strength of the completed the members. pier. l 20 An object of the invention therefore is the pro- The mOld fOr the steVes, Figures 3 and 4, is vision of a. mold for forming one or a number mounted upon a base member 22 and consists of staves or lagging at one time so constructed as in a plurality 0f forms 24 0f Substantially i11- to be readily assembled or disassembled and which verted U-shape, which are held in position upon 25 can be adjusted Within limits to vary the length the bese by end blOCkS 26 edjustebly POsitiOned 25 and size of the units eitherinregard to the ange 0n the bese by inserting a Din 28 through anor stem or both, opening provided in the ange formed inte- With these and various other objects in view gral With the blOCk and iIitO any 011e 0f a pluthe invention may consist of certain novel fearelity 0f Openings 32 in the base member. In 30 tures of construction and operation as will be this manner the forms 24 can be held t0 the 30 more fully described and particularly pointed out bese member and pOsitiOIleCl s0 that the Space in the specication, drawings and claims apbetween the forms is of the desired Width for pended hereto. forming the stem portion on the stave.y In a In the drawings which illustrate en embodisomewhat similar manner the partitions 34 are 35 ment of the device and wherein like reference adiustably secured on the forms 24, the ends of characters are used to designate like partsthe partitions being inserted in the blocks 36 Figure 1 is atop plan view of acylindrical memand adjustably positioned on the forms by pins ber formed of lagging contemplated by the pres- 38 inserted through holes in the flanges of blocks ent invention; 36 and then through any one of a plurality of 40 Figure2is an elevational view of the cylindrical openings 40. As more particularly ShOWIl in 40 member showing the same in place in the excavat- Figure 4 the partitions include a metal blank ed well with parts of the member being broken bent upon itself Awith one surface of the paravvay; tition being provided vvith recesses 42 extending Figure 3 is a plan view of the mold constructed longitudinally of the same to form the inter- 45 in accordance with the invention, and locking portion on the stave, While the other sur- 45 Figure 4 is a vertical transverse section taken face has a projection 44 DIOVidihg the recess 0n along line 4 4 of Figure 3. the stave. The length of the staves formed by In constructing a concrete pier for foundation the mold can be determined by positioning the Work the ground is rst excavated forming a. well plates 46 which are shapedso as to have a tight l several feet deep which is then lined with staves fitting engagement with adjacent forms 24 and 50 l securely held in place by metal rings. In the their corresponding adjacent partitions 34.

use of the lagging formed by the mold of the The present 'construction of mold can be readpresent invention the excavation would have the ily assembled or disassembled as desired with appearance such as shown in Figures 1 and 2 adjustability of the parts being secured so that wherein the units 10 having a flange 12 and a. staves varying in size and length can be fabri- 55 cated prior to excavation. Portions between forms may be filled in or blocked so as to form the flanges only. Or partitions 34 may be used on base plate without lower forms 24 for this same purpose. By inserting suitable wedgeshaped pieces between the form or partition members, the ends of the lagging may be made bevelled or taper-edged to permit the staves to be driven more easily in case it becomes expedient to adopt 'this feature in portions of the work. By thel adjustability of the sections of the mold a cast unit can be secured having a ange of increased or reduced width, the flange thickness remaining the same.y Such a unit is often required in caisson construction since the particular diameter of ways permit of an assembly of a definite number of staves of definite width.

It is to be understood that I do not wish to be` limited by the exact embodiment of the device shown, which is merely by way of illustration and not'limitation, as various and other forms of the device will be apparent to those skilled in the art without departing from the spirit of the invention or thescope of the claims.

I claim:

l. A mold Afor forming concrete staves including spaced forms, a partition removably secured to and located on the upper surface of each form and endrplates located between the forms and partitions and being adjustable for varying the excavation 4does not a1- length of the molded stave, said forms being removably secured to a base by means of housings receiving the ends of the forms and having a pin passing through an opening in the housing and base, and said base being provided with additional openings whereby the location of one form with respect to its adjacent form may be varied within limits.

2. A mold for forming concrete staves including spaced elongated forms,` a partition located on theupper surface of each'- form and extending substantially the length of the same, and end plates located between the forms and partitions and being adjustable for varying the length of "the molded staves, each partition being adjustablel on its .form to vary the distance between the partitions, and means securing the forms to a base :including housings receiving the ends of the form and having a pin passing through an opening in the housing and base.

3. Afrnold for forming a concrete stave including spaced 'members havingv a substantially horizontal upper surfaceand inwardly sloping sides, housings receiving the ends'of each member and being -removably secured t0 a base, an upstanding partition secured to the vhorizontal surface of each member, and end plates located between the members.` and partitions and being adjustable longitudinally for `varying the length of the molded stave.

v SIDNEY G. MARTIN. 

